From 794b18bc8a3f80445e1f85c9c87c74de9575c93a Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Wed, 13 Mar 2013 19:47:40 -0700
Subject: [PATCH] workqueue: separate out pool_workqueue locking into pwq_lock

This patch continues locking cleanup from the previous patch.  It
breaks out pool_workqueue synchronization from workqueue_lock into a
new spinlock - pwq_lock.  The followings are protected by pwq_lock.

* workqueue->pwqs
* workqueue->saved_max_active

The conversion is straight-forward.  workqueue_lock usages which cover
the above two are converted to pwq_lock.  New locking label PW added
for things protected by pwq_lock and FR is updated to mean flush_mutex
+ pwq_lock + sched-RCU.

This patch shouldn't introduce any visible behavior changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
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